how to get the selected option value of dropdown on display code example

Example 1: javascript get selected option

var e = document.getElementById("selectElementID");
var value=e.selectElement.options[e.selectedIndex].value;// get selected option value
var text=e.options[e.selectedIndex].text;//get the selected option text

Example 2: How to select a value in a dropdown

How do you handle Select type of dropdown?
    - If it is <select> we would have to use Select class from Selenium.
    - Methods to select from dropdown:
    Select s = new Select(element);
        - s.selectByVisibleText
        - s.selectByValue
        - s.selectByIndex 
--> How do we verify which option is selected in a dropdown?
    - If we want to get the currently selected option, 
    we use getFirstSelectedOption() method.
   
        -> return type: currently selected option as a web element
--> .getOptions();
    -> This method will return all of the options in the <select> web element.
    -> return type: List<WebElement>